EN 480-11:2005

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Equipment
  5.1 General
  5.2 Specimen preparation
  5.3 Microscopical analysis
6 Specimen production and preparation
  6.1 Specimen production
  6.2 Preparation of test surface
7 Microscopic procedure
  7.1 Basic procedure
  7.2 Values recorded
8 Calculations
  8.1 Data obtained
  8.2 Total traverse length
  8.3 Total air content
  8.4 Total number of chords measured
  8.5 Specific surface of the air
  8.6 Paste: air ratio
  8.7 Spacing factor
  8.8 Micro-air content
  8.9 Air void distribution
9 Test report
Annex A (informative) Theoretical basis of calculation
                      involved in Table 1
Annex B (informative) Worked example of the calculation of
                      air void distribution

This European Standard describes a test method for determination of the air- void structure in a hardened concrete sample which contains entrained air. The air-void structure is described by means of the following parameters, which are defined in clause 3. i) Total air content, ii) Specific surface of air void system, iii) Spacing factor, iv) Air-void size distribution, v) Micro air content.